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Image: Natural Entrance to Carlsbad Caverns
Natural Entrance to Carlsbad Caverns
Natural Entrance to Carlsbad Caverns
Natural Entrance to Carlsbad Caverns

An amphitheater at the natural entrance of Carlsbad Caverns.

Image: Prickly Pear Cacti
Prickly Pear Cacti
Prickly Pear Cacti
Prickly Pear Cacti

A field of prickly pear cacti at Carlsbad Caverns.

A field of prickly pear cacti at Carlsbad Caverns.

Image: Carlsbad Caverns
Carlsbad Caverns
Carlsbad Caverns
Carlsbad Caverns

A view of Carlsbad Caverns.

Image: Carlsbad Cave Bacon
Carlsbad Cave Bacon
Carlsbad Cave Bacon
Carlsbad Cave Bacon

Carlsbad Caverns has numerous speleothems, or cave formations. One of them is known as "cave bacon," due to the vertical formations' resemblance to bacon.

Carlsbad Caverns has numerous speleothems, or cave formations. One of them is known as "cave bacon," due to the vertical formations' resemblance to bacon.

Image: Carlsbad Cavern Cave Column
Carlsbad Cavern Cave Column
Carlsbad Cavern Cave Column
Carlsbad Cavern Cave Column

Carlsbad Caverns has numerous speleothems, or cave formations. This formation is known as a column, and it occurs when a stalactite and a stalagmite grow into each other.

Carlsbad Caverns has numerous speleothems, or cave formations. This formation is known as a column, and it occurs when a stalactite and a stalagmite grow into each other.

Image: Natural Entrance at Carlsbad Caverns
Natural Entrance at Carlsbad Caverns
Natural Entrance at Carlsbad Caverns
Image: Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance

A view of the Carlsbad Caverns natural entrance from inside the cave. Humidity from the cave condenses in the cooler surface air, producing a faint fog.

A view of the Carlsbad Caverns natural entrance from inside the cave. Humidity from the cave condenses in the cooler surface air, producing a faint fog.

Image: Cave Formations
Cave Formations
Cave Formations
Cave Formations

Carlsbad Caverns has numerous speleothems, or cave formations. These formations in this image are stalagmites and are located near the natural entrance of the cave. 

Carlsbad Caverns has numerous speleothems, or cave formations. These formations in this image are stalagmites and are located near the natural entrance of the cave. 

Image: Cholla Cactus Fruit
Cholla Cactus Fruit
Cholla Cactus Fruit
Cholla Cactus Fruit

A cholla cactus with yellow fruit

Image: Panorama of Carlsbad Caverns Natural Entrance
Panorama of Carlsbad Caverns Natural Entrance
Panorama of Carlsbad Caverns Natural Entrance
Image: Carlsbad Caverns
Carlsbad Caverns
Carlsbad Caverns
Carlsbad Caverns

A view of Carlsbad Caverns.

Image: Stalactites at the Carlsbad Caverns Natural Entrance
Stalactites at the Carlsbad Caverns Natural Entrance
Stalactites at the Carlsbad Caverns Natural Entrance
Stalactites at the Carlsbad Caverns Natural Entrance

Stalactites at the entrance to the natural entrance of Carlsbad Caverns.

Image: Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance
Carlsbad Caverns Natural Entrance

A view of Carlsbad Caverns' natural entrance from the interior of the cave.

Image: US 90 Bridge at Amistad Reservoir
US 90 Bridge at Amistad Reservoir
US 90 Bridge at Amistad Reservoir
US 90 Bridge at Amistad Reservoir

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the border of Texas and Mexico. This image shows the bridge portion of US 90 as it crosses the reservoir.

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the border of Texas and Mexico. This image shows the bridge portion of US 90 as it crosses the reservoir.

Image: Mule Deer Doe
Mule Deer Doe
Mule Deer Doe
Mule Deer Doe

A female mule deer, called a doe, forages near the Caverns of Sonora in Texas.

A female mule deer, called a doe, forages near the Caverns of Sonora in Texas.

Image: Cliffs of Diablo East
Cliffs of Diablo East
Cliffs of Diablo East
Cliffs of Diablo East

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others.

 

 

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others.

 

 

Image: Panorama of Amistad NRA
Panorama of Amistad NRA
Panorama of Amistad NRA
Panorama of Amistad NRA

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others.

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others.

Image: Prickly Pear Cacti at Amistad Reservoir
Prickly Pear Cacti at Amistad Reservoir
Prickly Pear Cacti at Amistad Reservoir
Prickly Pear Cacti at Amistad Reservoir

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others. Prickly pear cacti are common along the banks of the reservoir.

Amistad National Recreation Area includes the Amistad Reservoir, a man-made lake along the Texas and Mexico border. It is fed by the Rio Grande, Devils River, and the Pecos River, among others. Prickly pear cacti are common along the banks of the reservoir.

Image: Cave Popcorn Detail
Cave Popcorn Detail
Cave Popcorn Detail
Cave Popcorn Detail

A detail image of the bulbous cave formation known as "cave popcorn" in the Caverns of Sonora.

A detail image of the bulbous cave formation known as "cave popcorn" in the Caverns of Sonora.

Image: Cave Formations and Waterlines
Cave Formations and Waterlines
Cave Formations and Waterlines
Cave Formations and Waterlines

A series of speleothems, or cave formations, in the Caverns of Sonora. A prior waterline can be seen in the formations where the color changes from primarily white (formations formed in the air) to more beige (formations formed underwater). In addition, the previously submerged formations are larger than the ones that formed above the waterline.

A series of speleothems, or cave formations, in the Caverns of Sonora. A prior waterline can be seen in the formations where the color changes from primarily white (formations formed in the air) to more beige (formations formed underwater). In addition, the previously submerged formations are larger than the ones that formed above the waterline.

Image: Wind-blown Cave
Wind-blown Cave
Wind-blown Cave
Wind-blown Cave

These sections of the Caverns of Sonora were carved by the wind, rather than by water. As such, they have smooth walls.

These sections of the Caverns of Sonora were carved by the wind, rather than by water. As such, they have smooth walls.

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